Without --proxy-headers + --forwarded-allow-ips, uvicorn ignores the
X-Forwarded-Proto header Traefik sets, so Starlette's url_for() picks
up the internal scheme (http) and host (the container's bind address).
That makes every <link>/<img> href in templates point at an internal
URL with the wrong scheme — the browser refuses CSS/images as mixed
content and the public page renders unstyled.
With both flags the template output becomes
https://quartermaster.unbiasedgeek.com/static/… as expected.
The wildcard in --forwarded-allow-ips='*' is safe here because the
compose file publishes no host ports — only containers on proxy-net
(i.e. Traefik) can reach port 8000.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
